any tips for second pregnancy?

Mahi
Currently 7 week preg and have 15 month daughter... does anyone have any tips on what not to do? 
I carry my daughter up and down the stairs several times during a day. She is so active.. she breaks the child door and climb the stairs. Anyways someone told
Me that I shouldn't be carrying her stairs for my first trimester- high chance of miscarriage. Is this true??? Any other tips thank u ladies